The announcement of the 2016 Horse of the Year will cap the evening Saturday at Gulfstream Park when the Eclipse Awards are presented for the 46th time. If social-media chitchat and informal polls are right, then California Chrome, a 5-year-old last year, will top Arrogate for the honor, despite the fact that Arrogate, then 3, beat the older horse the only time they met in the Breeders’ Cup Classic. And, of course, polls are never wrong.